Marine propulsion – Means for accomodating or moving engine fluids – Means for handling exhaust gas
Patent
1998-02-25
1999-11-09
Avila, Stephen
Marine propulsion
Means for accomodating or moving engine fluids
Means for handling exhaust gas
B63H 2132
Patent
active
059803436
ABSTRACT:
A two pathway exhaust and water discharge through-hull system is coupled to a muffler for separating exhaust gases and cooling water at operating speeds such that at low engine speeds exhaust gases and water are discharged through a first outlet preferably above the waterline and, when the engine speed is increased above a predetermined level, exhaust gases are discharged through a second outlet which communicates with a streamlined, low back-pressure underwater discharge skeg and water is discharged through the first outlet. In a preferred embodiment of the invention, a discharge skeg is positioned at each comer of the transom for a twin engined vessel. In a preferred embodiment also, each of the underwater discharge skegs is mounted to the bottom of the hull and includes a mounting flange and an upwardly extending collar which extends through the hull and is coupled to an adapter for coupling the discharge skeg to an exhaust outlet of a muffler. As a result, an exhaust system is provided which is efficient, quite and which discharges exhaust gases underwater and away from the vessel when underway at normal operating speeds.
REFERENCES:
patent: 3371645 (1968-03-01), Ward
patent: 4019456 (1977-04-01), Harbert
patent: 4509927 (1985-04-01), Ikeda
patent: 5078631 (1992-01-01), Harbert
patent: 5505644 (1996-04-01), Ousley, II et al.
patent: 5700172 (1997-12-01), Ousley, II et al.
Exhibit A--Photographs 1, 2 and 3.
Avila Stephen
S2 Yachts Inc.
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